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959ef981 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
698c6c7c DW |
2 | /* |
3 | * Copyright (C) 2018 Oracle. All Rights Reserved. | |
698c6c7c | 4 | * Author: Darrick J. Wong <darrick.wong@oracle.com> |
698c6c7c | 5 | */ |
a440f877 | 6 | #include "xfs.h" |
698c6c7c | 7 | #include <stdint.h> |
698c6c7c DW |
8 | #include <stdlib.h> |
9 | #include <sys/statvfs.h> | |
698c6c7c DW |
10 | #include "path.h" |
11 | #include "ptvar.h" | |
12 | #include "xfs_scrub.h" | |
13 | #include "common.h" | |
14 | #include "fscounters.h" | |
15 | #include "spacemap.h" | |
16 | ||
17 | /* Phase 7: Check summary counters. */ | |
18 | ||
593f2ab8 | 19 | struct summary_counts { |
698c6c7c DW |
20 | unsigned long long dbytes; /* data dev bytes */ |
21 | unsigned long long rbytes; /* rt dev bytes */ | |
22 | unsigned long long next_phys; /* next phys bytes we see? */ | |
23 | unsigned long long agbytes; /* freespace bytes */ | |
24 | }; | |
25 | ||
26 | /* Record block usage. */ | |
27 | static bool | |
28 | xfs_record_block_summary( | |
593f2ab8 DW |
29 | struct scrub_ctx *ctx, |
30 | const char *descr, | |
31 | struct fsmap *fsmap, | |
32 | void *arg) | |
698c6c7c | 33 | { |
593f2ab8 DW |
34 | struct summary_counts *counts; |
35 | unsigned long long len; | |
698c6c7c DW |
36 | |
37 | counts = ptvar_get((struct ptvar *)arg); | |
38 | if (fsmap->fmr_device == ctx->fsinfo.fs_logdev) | |
39 | return true; | |
40 | if ((fsmap->fmr_flags & FMR_OF_SPECIAL_OWNER) && | |
41 | fsmap->fmr_owner == XFS_FMR_OWN_FREE) | |
42 | return true; | |
43 | ||
44 | len = fsmap->fmr_length; | |
45 | ||
46 | /* freesp btrees live in free space, need to adjust counters later. */ | |
47 | if ((fsmap->fmr_flags & FMR_OF_SPECIAL_OWNER) && | |
48 | fsmap->fmr_owner == XFS_FMR_OWN_AG) { | |
49 | counts->agbytes += fsmap->fmr_length; | |
50 | } | |
51 | if (fsmap->fmr_device == ctx->fsinfo.fs_rtdev) { | |
52 | /* Count realtime extents. */ | |
53 | counts->rbytes += len; | |
54 | } else { | |
55 | /* Count datadev extents. */ | |
56 | if (counts->next_phys >= fsmap->fmr_physical + len) | |
57 | return true; | |
58 | else if (counts->next_phys > fsmap->fmr_physical) | |
59 | len = counts->next_phys - fsmap->fmr_physical; | |
60 | counts->dbytes += len; | |
61 | counts->next_phys = fsmap->fmr_physical + fsmap->fmr_length; | |
62 | } | |
63 | ||
64 | return true; | |
65 | } | |
66 | ||
67 | /* Add all the summaries in the per-thread counter */ | |
68 | static bool | |
69 | xfs_add_summaries( | |
593f2ab8 DW |
70 | struct ptvar *ptv, |
71 | void *data, | |
72 | void *arg) | |
698c6c7c | 73 | { |
593f2ab8 DW |
74 | struct summary_counts *total = arg; |
75 | struct summary_counts *item = data; | |
698c6c7c DW |
76 | |
77 | total->dbytes += item->dbytes; | |
78 | total->rbytes += item->rbytes; | |
79 | total->agbytes += item->agbytes; | |
80 | return true; | |
81 | } | |
82 | ||
83 | /* | |
84 | * Count all inodes and blocks in the filesystem as told by GETFSMAP and | |
85 | * BULKSTAT, and compare that to summary counters. Since this is a live | |
86 | * filesystem we'll be content if the summary counts are within 10% of | |
87 | * what we observed. | |
88 | */ | |
89 | bool | |
90 | xfs_scan_summary( | |
593f2ab8 | 91 | struct scrub_ctx *ctx) |
698c6c7c | 92 | { |
593f2ab8 DW |
93 | struct summary_counts totalcount = {0}; |
94 | struct ptvar *ptvar; | |
95 | unsigned long long used_data; | |
96 | unsigned long long used_rt; | |
97 | unsigned long long used_files; | |
98 | unsigned long long stat_data; | |
99 | unsigned long long stat_rt; | |
100 | uint64_t counted_inodes = 0; | |
101 | unsigned long long absdiff; | |
102 | unsigned long long d_blocks; | |
103 | unsigned long long d_bfree; | |
104 | unsigned long long r_blocks; | |
105 | unsigned long long r_bfree; | |
106 | unsigned long long f_files; | |
107 | unsigned long long f_free; | |
108 | bool moveon; | |
109 | bool complain; | |
110 | int ip; | |
111 | int error; | |
698c6c7c DW |
112 | |
113 | /* Flush everything out to disk before we start counting. */ | |
3f9efb2e | 114 | error = syncfs(ctx->mnt.fd); |
698c6c7c DW |
115 | if (error) { |
116 | str_errno(ctx, ctx->mntpoint); | |
117 | return false; | |
118 | } | |
119 | ||
593f2ab8 | 120 | ptvar = ptvar_init(scrub_nproc(ctx), sizeof(struct summary_counts)); |
698c6c7c DW |
121 | if (!ptvar) { |
122 | str_errno(ctx, ctx->mntpoint); | |
123 | return false; | |
124 | } | |
125 | ||
126 | /* Use fsmap to count blocks. */ | |
127 | moveon = xfs_scan_all_spacemaps(ctx, xfs_record_block_summary, ptvar); | |
128 | if (!moveon) | |
129 | goto out_free; | |
130 | moveon = ptvar_foreach(ptvar, xfs_add_summaries, &totalcount); | |
131 | if (!moveon) | |
132 | goto out_free; | |
133 | ptvar_free(ptvar); | |
134 | ||
135 | /* Scan the whole fs. */ | |
136 | moveon = xfs_count_all_inodes(ctx, &counted_inodes); | |
137 | if (!moveon) | |
138 | goto out; | |
139 | ||
140 | moveon = xfs_scan_estimate_blocks(ctx, &d_blocks, &d_bfree, &r_blocks, | |
141 | &r_bfree, &f_files, &f_free); | |
142 | if (!moveon) | |
143 | return moveon; | |
144 | ||
145 | /* | |
146 | * If we counted blocks with fsmap, then dblocks includes | |
147 | * blocks for the AGFL and the freespace/rmap btrees. The | |
148 | * filesystem treats them as "free", but since we scanned | |
149 | * them, we'll consider them used. | |
150 | */ | |
151 | d_bfree -= totalcount.agbytes >> ctx->blocklog; | |
152 | ||
153 | /* Report on what we found. */ | |
154 | used_data = (d_blocks - d_bfree) << ctx->blocklog; | |
155 | used_rt = (r_blocks - r_bfree) << ctx->blocklog; | |
156 | used_files = f_files - f_free; | |
157 | stat_data = totalcount.dbytes; | |
158 | stat_rt = totalcount.rbytes; | |
159 | ||
160 | /* | |
161 | * Complain if the counts are off by more than 10% unless | |
162 | * the inaccuracy is less than 32MB worth of blocks or 100 inodes. | |
163 | */ | |
164 | absdiff = 1ULL << 25; | |
165 | complain = verbose; | |
166 | complain |= !within_range(ctx, stat_data, used_data, absdiff, 1, 10, | |
167 | _("data blocks")); | |
168 | complain |= !within_range(ctx, stat_rt, used_rt, absdiff, 1, 10, | |
169 | _("realtime blocks")); | |
170 | complain |= !within_range(ctx, counted_inodes, used_files, 100, 1, 10, | |
171 | _("inodes")); | |
172 | ||
173 | if (complain) { | |
174 | double d, r, i; | |
175 | char *du, *ru, *iu; | |
176 | ||
177 | if (used_rt || stat_rt) { | |
178 | d = auto_space_units(used_data, &du); | |
179 | r = auto_space_units(used_rt, &ru); | |
058f45da | 180 | i = auto_units(used_files, &iu, &ip); |
698c6c7c | 181 | fprintf(stdout, |
058f45da DW |
182 | _("%.1f%s data used; %.1f%s realtime data used; %.*f%s inodes used.\n"), |
183 | d, du, r, ru, ip, i, iu); | |
698c6c7c DW |
184 | d = auto_space_units(stat_data, &du); |
185 | r = auto_space_units(stat_rt, &ru); | |
058f45da | 186 | i = auto_units(counted_inodes, &iu, &ip); |
698c6c7c | 187 | fprintf(stdout, |
058f45da DW |
188 | _("%.1f%s data found; %.1f%s realtime data found; %.*f%s inodes found.\n"), |
189 | d, du, r, ru, ip, i, iu); | |
698c6c7c DW |
190 | } else { |
191 | d = auto_space_units(used_data, &du); | |
058f45da | 192 | i = auto_units(used_files, &iu, &ip); |
698c6c7c | 193 | fprintf(stdout, |
058f45da DW |
194 | _("%.1f%s data used; %.*f%s inodes used.\n"), |
195 | d, du, ip, i, iu); | |
698c6c7c | 196 | d = auto_space_units(stat_data, &du); |
058f45da | 197 | i = auto_units(counted_inodes, &iu, &ip); |
698c6c7c | 198 | fprintf(stdout, |
058f45da DW |
199 | _("%.1f%s data found; %.*f%s inodes found.\n"), |
200 | d, du, ip, i, iu); | |
698c6c7c DW |
201 | } |
202 | fflush(stdout); | |
203 | } | |
204 | ||
205 | /* | |
206 | * Complain if the checked inode counts are off, which | |
207 | * implies an incomplete check. | |
208 | */ | |
209 | if (verbose || | |
210 | !within_range(ctx, counted_inodes, ctx->inodes_checked, 100, 1, 10, | |
211 | _("checked inodes"))) { | |
212 | double i1, i2; | |
213 | char *i1u, *i2u; | |
058f45da | 214 | int i1p, i2p; |
698c6c7c | 215 | |
058f45da DW |
216 | i1 = auto_units(counted_inodes, &i1u, &i1p); |
217 | i2 = auto_units(ctx->inodes_checked, &i2u, &i2p); | |
698c6c7c | 218 | fprintf(stdout, |
058f45da DW |
219 | _("%.*f%s inodes counted; %.*f%s inodes checked.\n"), |
220 | i1p, i1, i1u, i2p, i2, i2u); | |
698c6c7c DW |
221 | fflush(stdout); |
222 | } | |
223 | ||
224 | /* | |
225 | * Complain if the checked block counts are off, which | |
226 | * implies an incomplete check. | |
227 | */ | |
228 | if (ctx->bytes_checked && | |
229 | (verbose || | |
230 | !within_range(ctx, used_data + used_rt, | |
231 | ctx->bytes_checked, absdiff, 1, 10, | |
232 | _("verified blocks")))) { | |
233 | double b1, b2; | |
234 | char *b1u, *b2u; | |
235 | ||
236 | b1 = auto_space_units(used_data + used_rt, &b1u); | |
237 | b2 = auto_space_units(ctx->bytes_checked, &b2u); | |
238 | fprintf(stdout, | |
239 | _("%.1f%s data counted; %.1f%s data verified.\n"), | |
240 | b1, b1u, b2, b2u); | |
241 | fflush(stdout); | |
242 | } | |
243 | ||
244 | moveon = true; | |
245 | ||
246 | out: | |
247 | return moveon; | |
248 | out_free: | |
249 | ptvar_free(ptvar); | |
250 | return moveon; | |
251 | } |